I Am Legend

Not seen it yet but if you knew you were the only human left on earth the first thing you'd do is put on a porno and have a wank with the door open. Surely.

Maybe this is what happens in the film and the alsation just trots in and starts licking Will Smith's balls. That would explain how they met.

Get yourself along to your local multiplex and see if that's what happens. Let me know.